<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    </head>
    <frameset cols="33%,33%,*">
        <frame src="1.html">

        <frameset rows="30%,*">
            <frame src="2.html">
            <frame src="3.html" name="f3">
        </frameset>

        <frame src="4.html">
    </frameset>
</html>